Tackle-block.



No. 875,387. .PATENTED 1130.31, 1901.

' w. H. STAM.

TACKLE BLOCK. APPLICATION FILED APR. 9,1907.

1/91 11 uses THE uomws PETERS 0a.. WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

WILLIAM H. STAM, OF VERDI, NEVADA.

TACKLE-BLOCK.

Patented Dec. 31, 1907.

To all whom it may concern:

Be it known that WILLIAM H. STAM, citizen of the United States, residingat Verdi, in the county of Washoe and State of Nevada, have inventedcertain new and useful Improvements in Tackle-Blocks, of which thefollowing is a specification.

The object of the present invention is to provide an improved tackleblock which embodies novel means for permitting an inter mediate portionof the cable to be entirely disengaged from the block by slipping itlaterally from the pulley or sheave mounted therein.

One of the objects of the invention is to design a simple and efficientblock of this character which can be readily operated by a single manwithout the necessity of releasing the tension in the cable and haulingin the slack, which operation is for many purposes extremelyobjectionable in as much as it occasions the loss of a considerableamount of time.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction and the means foreffecting the result, reference is to be had to the followingdescription and accompanying drawings, in which:

' Figure 1 is a side elevation showing the block in an open position.Fig. 2 is an edge view of the block, portions being broken away andshown in section.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The shell within which the pulley or sheave 1 is mounted comprises apair of side plates 2 and 3, the lower portions of which have a hingedconnection while the upper portions thereof are provided with therespective extensions 4 and 5 which form a means for looking the sideplates together and also for attaching the shell to any suitablesupport. In bringing about the hinged connection between the two sideplates it will be observed that a lateral extension 6 projects from thelower edge of the plate 3 and has the outer edge thereof hinged to theplate 2 as indicated at 7. The extension 4 is somewhat longer than thecorresponding extension 5 and has the extremity thereof hooked at 8 toform a means for attaching the shell to a support. Offset portions 9 areformed in the extension 4 by means of which a portion 10 thereof isthrown inwardly so as to normally fit against the extension 5. A slide11 operates upon the extension 4 and is designed to normally engage theopposite extension 5 and hold the two side plates of the shell in aclosed position when the block is in use.

The sheave 1 is provided with the usual grooved periphery 12 and at itscentral portion with a bearing sleeve 13 which receives the shank of aheaded journal pin 14, the latter member being rigid with the side plate3. An opening 15 designed to receive the head of the journal pin 14 isformed in the side plate 2, while the opposite end of the journal pinextends through the opposite side plate 3 and is capped by a ring 16which is rigidly secured both to the said pin and the case. sheave 1 iseffectively held against displacement from the ournal pin by means ofthe head thereon and that when the hinged side plates of the shell areswung apart the cable can be readily disengaged from the sheave withoutliability of the latter member becoming displaced or lost.

In order to distribute the strain evenly between the two extensions 4and 5, the portion 10 of the extension 4 is provided with a stud 20 andthe extension 5 is formed with an opening 21 designed to receive thestud 20 when the two sections of the sheave are swung together as shownin Fig. 2. It will be readily apparent that with this construction alllongitudinal slipping of the extensions 4 and 5 with respect to eachother is effectively revented.

Having t us described the invention, what is claimed as new is:

1. In a device of the character described, the combination of a shellcomprising a pair of side plates having corresponding edges thereofhinged, means for locking the plates in a closed position, a journal pinprojecting from one of the plates, the opposite plate being providedwith an opening normally receiving the extremity of the journal pin, anda sheave mounted upon the journal pin.

2. In a device of the character described, the combination of a shellcomprising a pair of side plates having corresponding edges thereofhinged, extensions rojecting from the opposite edges of the si e plates,one of said extensions having a hooked extremity and being provided withoffsets throwing a portion thereof against the opposite exten sion, aslide locking the two extensions to- It will thus be apparent that thegether, and a sheave mounted upon one of the side plates.

3. In a device of the character described, the combination of a shellcomprising a pair of side plates having corresponding edges thereofhinged, means for locking the plates in a closed position, a headedjournal pin projecting from one of the plates, the opposite plate beingprovided with an opening normally receiving the head of the journal pin,and a sheave mounted upon the journal pin and held against displacementby the head thereof.

4. In a device of the character described, the combination of a shellcomprising a pair of hinged side plates, means for locking the sideplates in a closed position, a headed pin carried by one of the sideplates and extending through the same, a collar capping the extremity ofthe headed pin and rigidly connected to both the pin and side plate, anda sheave mounted upon the said headed in.

5. In a device of the character descri ed, the combination of a shellcomprising a pair of side plates having corresponding edges thereofhinged, extensions projecting from the plates, a stud projecting fromone of the extensions, the opposite extension being provided with anopening designed to receive the stud, means for locking the extensionstogether, and a sheave mounted upon one of the side plates' 6. In adevice of the character described, the combination of a shell comprisinga pair of hinged side plates, means for locking the said plates in aclosed osition, a headed pin projecting from one o the plates and eX-tending therethrough, the opposite plate being formed with an o ening toreceive the head of the pin, a co lar capping the extremity ofthe headedpin and rigidly connected to both the pin and the case, and a sheaveournaled upon the said pin.

In testimony whereof I a'flix my signature in presence of two witnesses.

WILLIAM H, STAM.

Witnesses:

RICHARD C. BERGWIN, HAROLD F. CoNDoN.

